arch/h8300/boot/compressed/misc.c

   1 /*
   2  * arch/h8300/boot/compressed/misc.c
   3  *
   4  * This is a collection of several routines from gzip-1.0.3
   5  * adapted for Linux.
   6  *
   7  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
   8  *
   9  * Adapted for h8300 by Yoshinori Sato 2006
  10  */
  11
  12 #include <asm/uaccess.h>
  13
  14 /*
  15  * gzip declarations
  16  */
  17
  18 #define OF(args)  args
  19 #define STATIC static
  20
  21 #undef memset
  22 #undef memcpy
  23 #define memzero(s, n)     memset((s), (0), (n))
  24
  25 extern int _end;
  26 static unsigned long free_mem_ptr;
  27 static unsigned long free_mem_end_ptr;
  28
  29 extern char input_data[];
  30 extern int input_len;
  31 static unsigned char *output;
  32
  33 #define HEAP_SIZE             0x10000
  34
  35 #include "../../../../lib/decompress_inflate.c"
  36
  37 void *memset(void *s, int c, size_t n)
  38 {
  39         int i;
  40         char *ss = (char *)s;
  41
  42         for (i = 0; i < n; i++)
  43                 ss[i] = c;
  44         return s;
  45 }
  46
  47 void *memcpy(void *dest, const void *src, size_t n)
  48 {
  49         int i;
  50         char *d = (char *)dest, *s = (char *)src;
  51
  52         for (i = 0; i < n; i++)
  53                 d[i] = s[i];
  54         return dest;
  55 }
  56
  57 static void error(char *x)
  58 {
  59
  60         while (1)
  61                 ;       /* Halt */
  62 }
  63
  64 #define STACK_SIZE (4096)
  65 long user_stack[STACK_SIZE];
  66 long *stack_start = &user_stack[STACK_SIZE];
  67
  68 void decompress_kernel(void)
  69 {
  70         free_mem_ptr = (unsigned long)&_end;
  71         free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
  72
  73         __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
  74 }